package com.mimi.service.impl;

import com.mimi.converter.OrderMaster2OrderDTOConverter;
import com.mimi.dataobject.OrderDetail;
import com.mimi.dataobject.OrderMaster;
import com.mimi.dataobject.ProductInfo;
import com.mimi.dto.CartDTO;
import com.mimi.dto.OrderDTO;
import com.mimi.enums.OrderStatusEnum;
import com.mimi.enums.PayStatusEnum;
import com.mimi.enums.ResultEnum;
import com.mimi.exception.ResponseBankException;
import com.mimi.exception.SellException;
import com.mimi.repository.OrderDetailRepository;
import com.mimi.repository.OrderMasterRepository;
import com.mimi.service.*;
import com.mimi.util.KeyUtil;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.PageImpl;
import org.springframework.data.domain.Pageable;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.CollectionUtils;

import java.math.BigDecimal;
import java.math.BigInteger;
import java.util.ArrayList;
import java.util.List;
import java.util.stream.Collector;
import java.util.stream.Collectors;

/**
 * @Author:徐向
 * @Description:
 * @Date: Created in 13:04 2017/10/9
 */
@Service
@Slf4j
public class OrderServiceImpl implements OrderService {



    @Autowired
    private ProductService productService;

    @Autowired
    private OrderDetailRepository orderDetailRepository;

    @Autowired
    private OrderMasterRepository orderMasterRepository;

    @Autowired
    private PayService payService;

    @Autowired
    private PushMessageService pushMessageService;

    @Autowired
    private WebSocket webSocket;

    @Override
    @Transactional
    public OrderDTO create(OrderDTO orderDTO) {
        String orderId = KeyUtil.getUniqueKey();
        //orderAmount的定义不要设为全局,不然会出问题,计算不对,会累计相加.
        BigDecimal orderAmount = new BigDecimal(BigInteger.ZERO);
//        List<CartDTO> cartDTOList = new ArrayList<>();
        //1.查询商品(数量,价格)
        for (OrderDetail orderDetail : orderDTO.getOrderDetailList()) {
          ProductInfo productInfo= productService.findOne(orderDetail.getProductId());
            if (productInfo == null) {
                throw new SellException(ResultEnum.PRODUCT_NOT_EXIST);
// 返回银行报错               throw new ResponseBankException();
            }
            //2.计算订单总价
            orderAmount =productInfo.getProductPrice().multiply(new BigDecimal(orderDetail.getProductQuantity())).add(orderAmount);
            //订单详情入库
            orderDetail.setDetailId(KeyUtil.getUniqueKey());
            orderDetail.setOrderId(orderId);
            BeanUtils.copyProperties(productInfo,orderDetail);
            orderDetailRepository.save(orderDetail);
//            CartDTO cartDTO = new CartDTO(orderDetail.getProductId(), orderDetail.getProductQuantity());
//
//            cartDTOList.add(cartDTO);
        }

        //3.写入订单数据库(orderMaster和orderDetail)
        OrderMaster orderMaster = new OrderMaster();
        orderDTO.setOrderId(orderId);
        BeanUtils.copyProperties(orderDTO,orderMaster);
        orderMaster.setOrderAmount(orderAmount);
        orderMaster.setOrderStatus(OrderStatusEnum.NEW.getCode());
        orderMaster.setPayStatus(PayStatusEnum.WAIT.getCode());

        orderMasterRepository.save(orderMaster);
        //4.扣库存

        List<CartDTO> cartDTOList=orderDTO.getOrderDetailList().stream().map(e -> new CartDTO(e.getProductId(),e.getProductQuantity())).collect(Collectors.toList()
        );
        productService.decreaseStorck(cartDTOList);

        //发送websocket消息
        webSocket.sendMessage(orderDTO.getOrderId());
        return orderDTO;
    }

    @Override
    public OrderDTO findOne(String orderId) {
      OrderMaster orderMaster =orderMasterRepository.findOne(
               orderId);
        if (orderMaster == null) {
            throw new SellException(ResultEnum.ORDER_NOT_EXIST);
        }
        List<OrderDetail> orderDetailList = orderDetailRepository.findByOrderId(orderId);
        if (CollectionUtils.isEmpty(orderDetailList)) {
            throw new SellException(ResultEnum.ORDERDETAIL_NOT_EXIST);
        }
        OrderDTO orderDTO = new OrderDTO();
        BeanUtils.copyProperties(orderMaster,orderDTO);
        orderDTO.setOrderDetailList(orderDetailList);

        return  orderDTO;
    }

    @Override
    public Page<OrderDTO> findList(String buyerOpenid, Pageable pageable) {
        Page<OrderMaster> orderMasterPage = orderMasterRepository.findByBuyerOpenid(buyerOpenid, pageable);

       List<OrderDTO> orderDTOList =OrderMaster2OrderDTOConverter.convert(orderMasterPage.getContent());
        Page<OrderDTO> orderDTOPage = new PageImpl<OrderDTO>(orderDTOList,pageable,orderMasterPage.getTotalElements());

        return orderDTOPage;
    }

    @Override
    @Transactional
    public OrderDTO cancel(OrderDTO orderDTO) {
        OrderMaster orderMaster = new OrderMaster();

        //判断订单状态
        if (!orderDTO.getOrderStatus().equals(OrderStatusEnum.NEW.getCode())) {
            log.error("取消订单:订单状态不正确, orderId={}, orderStatus={}",orderDTO.getOrderId(),orderDTO.getOrderStatus());
            throw new SellException(ResultEnum.ORDER_STATUS_ERROR);
        }
        //修改订单状态
        orderDTO.setOrderStatus(OrderStatusEnum.CANCEL.getCode());
        BeanUtils.copyProperties(orderDTO,orderMaster);
        OrderMaster updateResult = orderMasterRepository.save(orderMaster);
        if (updateResult == null) {
            log.error("取消订单:更新失败,orderMaster={}",orderMaster);
            throw new SellException(ResultEnum.ORDER_UPDATE_FAIL);
        }

        //返回库存
        if (CollectionUtils.isEmpty(orderDTO.getOrderDetailList())) {
            log.error("取消订单:订单中无商品详情,orderDTO={}", orderDTO);
            throw new SellException(ResultEnum.ORDER_DETAIL_EMPTY);
        }
        List<CartDTO> cartDTOList=orderDTO.getOrderDetailList().stream().map(e -> new CartDTO(e.getProductId(),e.getProductQuantity())).collect(Collectors.toList()
        );
        productService.increaseStorck(cartDTOList);
        //如果已经支付,需要退款
        if (orderDTO.getPayStatus().equals(PayStatusEnum.SUCCESS.getCode())) {
            payService.refund(orderDTO);

        }
        return orderDTO;
    }

    @Override
    @Transactional
    public OrderDTO finish(OrderDTO orderDTO) {
        //判断订单状态
        if (!orderDTO.getOrderStatus().equals(OrderStatusEnum.NEW.getCode())) {
            log.error("完结订单 订单状态不正确,orderId{},orderStatus={}",orderDTO.getOrderId(),orderDTO.getOrderStatus());
            throw new SellException(ResultEnum.ORDER_STATUS_ERROR);
        }

        //修改订单状态
        orderDTO.setOrderStatus(OrderStatusEnum.FINISHED.getCode());

        OrderMaster orderMaster = new OrderMaster();
        BeanUtils.copyProperties(orderDTO, orderMaster);
        OrderMaster updateResult = orderMasterRepository.save(orderMaster);
        if (updateResult == null) {
            log.error("完结订单 更新失败, orderMaster={}", orderMaster);
            throw new SellException(ResultEnum.ORDER_UPDATE_FAIL);
        }

        //推送微信模版信息,消息类不一定非要抛异常，不影响业务．
        pushMessageService.orderStatus(orderDTO);


        return orderDTO;
    }

    @Override
    @Transactional
    public OrderDTO payid(OrderDTO orderDTO) {
        //判断订单状态
        if (!orderDTO.getOrderStatus().equals(OrderStatusEnum.NEW.getCode())) {
            log.error("订单支付成功 订单状态不正确,orderId{},orderStatus={}",orderDTO.getOrderId(),orderDTO.getOrderStatus());
            throw new SellException(ResultEnum.ORDER_STATUS_ERROR);
        }
        //判断支付状态
        if (!orderDTO.getPayStatus().equals(PayStatusEnum.WAIT.getCode())) {
            log.error("订单支付完成 订单支付状态不正确,orderDTO={}",orderDTO);
            throw new SellException(ResultEnum.ORDER_PAY_STATUS_ERROR);
        }
        //修改订单状态
        orderDTO.setPayStatus(PayStatusEnum.SUCCESS.getCode());
        OrderMaster orderMaster = new OrderMaster();
        BeanUtils.copyProperties(orderDTO, orderMaster);
        OrderMaster updateResult = orderMasterRepository.save(orderMaster);
        if (updateResult == null) {
            log.error("订单支付完成 更新失败, orderMaster={}", orderMaster);
            throw new SellException(ResultEnum.ORDER_UPDATE_FAIL);
        }
        return orderDTO;
    }

    @Override
    public Page<OrderDTO> findList(Pageable pageable) {
        Page<OrderMaster> orderMasterPage= orderMasterRepository.findAll(pageable);
        List<OrderDTO> orderDTOList =OrderMaster2OrderDTOConverter.convert(orderMasterPage.getContent());
        Page<OrderDTO> orderDTOPage = new PageImpl<OrderDTO>(orderDTOList,pageable,orderMasterPage.getTotalElements());

        return orderDTOPage;
    }
}













